> I have a natural gas Carrier High Efficiency 58 MPV 080 that was installed
> in mid-1994. Claims to be 95% efficient. Issue is the age and reliability
> generally and the noise of the draft inducer in particular over the last
> 1-2 years.
> I travel for work and it is our only source of heat in Minnesota. Last
> time it needed work it was a $700 for emergency call to install new
> motherboard (although we got a new ignitor at no cost at the same time
> since the guy screwed up). This mechanic alerted us to the sound of the
> draft assembly which has only increased since then, although it comes and
> -Draft inducer assembly replaced once already about 1999, still under
> warranty, by mechanic who said "This is a $900 repair, you're
> -Ignitor replaced once in 2004 by me
> -Some rotten plastic tubing replaced by me over the years
> -Thermostat replaced by me about 2005
> -Motherboard and ignitor replaced Jan. 2010 by mechanic, $700 (noted
> -Tune up mechanic in Sept. 2010 said everything OK, heat exchanger OK,
> basically tried to sell me duct cleaning
> -Just got an estimate for new furnace. Goodman GMVC95 about $3000 after
> rebates. Estimator also seemed to be impressed by the performance of the
> furnace except for the rattling-like noise of the draft inducer.
> 1. new furnace now, easy since everything is working, off-season lower
> price, eliminates most risk of losing heat for a long time.
> 2. Start service agreement in fall in case draft inducer breaks, about
> 3. Replace draft inducer by myself (generic or carrier *) in the
> summer when there is no heating requirement and hence no deadline stress,
> plenty of time to get the right tools and advice.
> 4. Having a mechanic replace the draft inducer assembly with a Carrier
> part for $1000 seems a poor investment.
> Any thoughts out *
If its working and heating properly then , replace IDM..But, remember to get it checked every year for safety..